Crime & Mystery — Kindle Category Opportunity
Competition snapshot for the Mystery, Thriller & Suspense best-seller list, ease-of-entry score 36.0/100.
Category metrics
Score
36.0
Median reviews
3,069
Weak share (top 20)
10%
Median price
$5.49
Median star rating
4.5
Books scanned
50
Worth writing in?
Crime & Mystery is heavily defended: incumbents are deep-reviewed and the top 20 rarely cracks. New releases can still chart with ads or a launch push, but expect to climb over established authors rather than around them. Ease-of-entry score 36.0/100.
Breakout books — top 15, under 100 reviews, $0.99–4.99
Best-seller list on Amazon| # | Title | Star | Reviews | Price |
|---|---|---|---|---|
| 8 | The Dreadnought Court Complete Series Boxed Set | 2.0 | 2 | $0.99 |
High-frequency phrases in this category's titles
Mine all categoriesHigh-frequency phrases mined from the 50 best-seller titles on this category's list. The ease-of-entry score tells you how winnable the category is; these title phrases tell you which words readers search with — use the two layers together. Frequency is a title statistic, not a search-volume estimate.
| Phrase | Titles | Rank-weighted score |
|---|---|---|
| murderbot diaries | 6 | 217 |
| apple tv streaming | 4 | 133 |
| basis for the apple | 4 | 133 |
| science fiction | 6 | 81 |
| scifi adventure | 3 | 65 |
| science fiction thriller | 5 | 64 |
| psychological thriller | 2 | 42 |
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Category scores show where entry is easiest; keyword lookups show whether readers actually reach for it. A free account includes keyword competition lookups plus unlimited category scans.
After you publish: why aren't readers buying?
Category research picks the direction; review diagnosis reads the readers. The same platform clusters a book's critical reviews into severity-ranked root causes, each anchored to verbatim quotes — see it applied to a full narrative-history title.
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Research snapshot scanned on Oct 19, 2026. Refreshed periodically — not live tracking.